1 #ifndef __ASM_METAG_ATOMIC_H
2 #define __ASM_METAG_ATOMIC_H
4 #include <linux/compiler.h>
5 #include <linux/types.h>
6 #include <asm/cmpxchg.h>
8 #if defined(CONFIG_METAG_ATOMICITY_IRQSOFF)
9 /* The simple UP case. */
10 #include <asm-generic/atomic.h>
13 #if defined(CONFIG_METAG_ATOMICITY_LOCK1)
14 #include <asm/atomic_lock1.h>
16 #include <asm/atomic_lnkget.h>
19 #define atomic_add_negative(a, v) (atomic_add_return((a), (v)) < 0)
21 #define atomic_dec_return(v) atomic_sub_return(1, (v))
22 #define atomic_inc_return(v) atomic_add_return(1, (v))
25 * atomic_inc_and_test - increment and test
26 * @v: pointer of type atomic_t
28 * Atomically increments @v by 1
29 * and returns true if the result is zero, or false for all
32 #define atomic_inc_and_test(v) (atomic_inc_return(v) == 0)
34 #define atomic_sub_and_test(i, v) (atomic_sub_return((i), (v)) == 0)
35 #define atomic_dec_and_test(v) (atomic_sub_return(1, (v)) == 0)
37 #define atomic_inc(v) atomic_add(1, (v))
38 #define atomic_dec(v) atomic_sub(1, (v))
40 #define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
42 #define smp_mb__before_atomic_dec() barrier()
43 #define smp_mb__after_atomic_dec() barrier()
44 #define smp_mb__before_atomic_inc() barrier()
45 #define smp_mb__after_atomic_inc() barrier()
49 #define atomic_dec_if_positive(v) atomic_sub_if_positive(1, v)
51 #include <asm-generic/atomic64.h>
53 #endif /* __ASM_METAG_ATOMIC_H */